fix: force build_contact and increment_view_count methods to use writing role

These methods are used by the widget to create a contact and helpcenter to
increment the view count. Since these methods are triggered by GET
request, Rails will use the reading role which will fail if the table
is readonly.

app/controllers/widgets_controller.rb

@@ -47,8 +47,10 @@ class WidgetsController < ActionController::Base
   def build_contact
     return if @contact.present?
 
-    @contact_inbox, @token = build_contact_inbox_with_token(@web_widget, additional_attributes)
-    @contact = @contact_inbox.contact
+    ActiveRecord::Base.connected_to(role: :writing) do
+      @contact_inbox, @token = build_contact_inbox_with_token(@web_widget, additional_attributes)
+      @contact = @contact_inbox.contact
+    end
   end
 
   def ensure_account_is_active